Grey Goo lockdown script?

I don't have land so I can't do any dev/test work on this, but I'd like to kickstart an effort to create a public domain script landowners can use to secure their property when there is a rez attack.

Because it can be hard to even find a bit of land to click on when its all built up, I'm thinking it would have to be something clickable or with a listen event to (a) remember the current land settings, (b) set them to the most restrictive mode possible, and (c) restore land settings by command or automatically after a set time. It should also be something that can accept IM's or emails so if the landowner or estate manager is off the grounds and can't get in, they can still activate it remotely. (this last opens up a possibility of a grid-wide warning network to automatically lock down subscribing estates...hmmm...probably a pipe dream though. I guess it would hinge on whether a two-way authentication is possible. Or maybe a Linden support page could be screen-scraped for the words "gray goo" and a recent timestamp?).

Anyone care to give it a go?

Unfortunately there is currently no way for a script to set the land settings.

Grey Goo Stopper also available in world at here, free both places, both places full source.

Current limitations are:
Only works when owner is online and in sim.
Can't stop objects from entering parcels on sides located on sim borders.
Only supports 80 "authorized" object owners.

First two are LL limitations and have been bug reported, last one is a memory limitation. Stops objects from entering your land if the owner isn't present by banning the owner for a time. Also features for limiting the number of prims guests can rez. Includes temp on rez prims.